a, a:link, a:visited, a:hover, a:active {
  text-decoration: none !important;
}

.image-swap {
  position: relative;
  display: inline-block;
}

.image-swap img {
  display: block;
  transition: opacity 0.3s ease-in-out;
}

.image-swap img:last-child {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}

.image-swap:hover img:last-child {
  opacity: 1;
}

.image-swap:hover img:first-child {
  opacity: 0;
}